HAPE Rescue at Everest Base Camp: A Documented Medical Emergency in Lobuche at 4,940 Metres

HGN's case note states that the case was received on 2 October 2026 at around 9:30 PM and that an initial email went to its insurance partner, IGIP, at 9:45 PM. At that stage the trekker was described as suffering from a suspected case of AMS. HGN's mission log records a phone alert at 03:15 AM on 3 October noting high heart rate, low oxygen level and inability to walk properly. The readings recorded at altitude before evacuation were a heart rate of 143 bpm and SpO₂ of 46%.

The trekker was an HGN client. The records provided do not describe the trekker's ascent schedule or earlier symptoms, so none are included here.

The hospital's clinical documentation recorded a diagnosis of HAPE. The following findings were documented:

Oxygen saturation: 46% at altitude before evacuation; 65% at the hospital. The two readings were taken at different altitudes, with different equipment and before and after evacuation, so they should not be treated as a measured improvement.

Heart rate: 143 bpm at altitude; 120/min at hospital.

Hospital examination: Headache and fever reported; crackles heard on chest examination; fully alert (GCS 15/15); pupils equal and reactive.

Mobility: Difficulty walking at the alert; unsteady gait noted at the hospital when walking in a straight line.

Investigations ordered: Chest X-ray, complete blood count, blood glucose, CRP and liver function tests.

Educational context: Crackles in the chest and low oxygen saturation are among the findings clinicians associate with fluid in the lungs. Gait is checked because unsteadiness can signal effects on the brain (HACE). The diagnosis stated in this case is the one recorded by the treating hospital; this article does not make or alter a diagnosis. Individual laboratory values are not published.

HAPE is a form of altitude illness in which fluid accumulates in the lungs, reducing oxygen uptake. According to the CDC Yellow Book and Wilderness Medical Society guidelines, it typically develops in the first days after arriving at a new altitude above about 2,500 m, and is more likely with rapid ascent and exertion. Typical features include:

Why HAPE Is a Serious High-Altitude Emergency

Why Lobuche's 4,940 m Altitude Matters

Lobuche is the last major overnight stop before Gorak Shep (about 5,160 m), Everest Base Camp (5,364 m) and Kala Patthar (about 5,545 m). At about 4,940 m, the air holds roughly half the oxygen availability of sea level. Trekkers arrive after several days of cumulative ascent. CDC guidance for travel above 3,000 m is to limit increases in sleeping elevation to about 500 m per day and take a rest day every three to four days. Exertion, cold and limited fluid intake are recognised risk factors, but the records do not show what contributed to this case.

Medical Assessment After Evacuation

No. HAPE always requires urgent medical attention, but not always a helicopter. Descent, supplemental oxygen and medical care are the priorities. A helicopter is considered when the person cannot descend safely under their own power, a facility is far away, or the condition is serious, and when weather, daylight and landing conditions allow. In this case, the hospital arrival followed an HGN-coordinated helicopter dispatch.

General guidance consistent with CDC and Wilderness Medical Society sources:

• Report symptoms early. Breathlessness, cough, fast heart rate or poor coordination are reasons to stop and call.
• A suspected AMS label can change. The field label was suspected AMS; the hospital recorded HAPE. Assume escalation is possible.
• Do not ascend while symptoms are worsening.
• Low oxygen readings plus trouble walking need urgent assessment.
• Plan acclimatisation with rest days and a measured ascent rate.
• Know who to call and share emergency contacts and insurer details within your group.
• Understand evacuation limits. Weather, daylight and landing conditions affect flights.
• Check insurance altitude limits and exclusions before departure.
• Early notification helps coordination. In this case the insurer was notified within about 15 minutes of HGN receiving the case.

Trekking Insurance and High-Altitude Medical Evacuation

Whether a policy covers high-altitude evacuation depends on its terms. Check:

• Maximum altitude: Everest Base Camp is 5,364 m and Kala Patthar about 5,545 m. A policy capped at 4,000 m or 5,000 m may not match the itinerary.
• Emergency medical transportation: Whether helicopter evacuation is covered and under what conditions.
• Medical necessity and insurer approval: Insurers or assistance providers often need to be notified and may need to approve evacuation.
• Exclusions and pre-existing conditions.
• Documentation: Policy details, emergency contacts and medical records.

In this case, the trekker was an HGN client and HGN notified its insurance partner, IGIP, on the evening the case was received. No insurance guarantees evacuation in every circumstance.